FYI, HE-500 is one step below a well-driven HE-6 [this is important because I never really felt like I truly achieved that status...]
The AVR should be better for the HE-500 than the Titanium but you'll need it for DSP so... maybe both :D
I use Dolby Headphone and although I have not tested other types of processing, I am a big DH fan and I really like the processing method they use. People find it a bit echoey, I do not - I find it scenery sensitive and pleasing [if perceived].
Yeah I am putting all my hopes into the 560... They better not let me down
Nah, the Titanium has a DSP.